EP0278180B1 - Behälter aus Plastikschaum für die Verdichtung von Pulvermaterial - Google Patents

Behälter aus Plastikschaum für die Verdichtung von Pulvermaterial Download PDF

Info

Publication number
EP0278180B1
EP0278180B1 EP87311464A EP87311464A EP0278180B1 EP 0278180 B1 EP0278180 B1 EP 0278180B1 EP 87311464 A EP87311464 A EP 87311464A EP 87311464 A EP87311464 A EP 87311464A EP 0278180 B1 EP0278180 B1 EP 0278180B1
Authority
EP
European Patent Office
Prior art keywords
container
medium
pressure
powder material
omni
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87311464A
Other languages
English (en)
French (fr)
Other versions
EP0278180A1 (de
Inventor
Walter J. Rozmus, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of EP0278180A1 publication Critical patent/EP0278180A1/de
Application granted granted Critical
Publication of EP0278180B1 publication Critical patent/EP0278180B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/03—Pressure vessels, or vacuum vessels, having closure members or seals specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/1208—Containers or coating used therefor
    • B22F3/1216—Container composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules

Definitions

  • the present invention provides a method for compacting a powder material to form a densified compact of a predetermined density, said method comprising disposing a sealed container, containing said powder material, in direct contact with a pressure transmitting medium that encapsulates said container, the container preventing contact between the medium and the powder material; and applying pressure to the medium whereby omnidirectional hydraulic pressure is transmitted to and through the container, causing a predetermined densification of said powder material, characterised in that said container has a permanently deformable, impermeable cellular structure, that collapses in response to the pressure exerted upon the medium and remains substantially collapsed after the hydrostatic pressure of the medium is discontinued.
  • an assembly for compacting powder metals, nonmetals, and combinations thereof to form a densified compact 14 ⁇ of a predetermined density is generally shown at 10.
  • the pressure application means comprises a ram 24 and a pot die 26 of a press.
  • the ram 24 is disposed in the pot die 26.
  • the ram 24 contains a seal 25 disposed on the periphery thereof for preventing the pressure transmitting medium 16 from flowing out of the pot die 26 between the ram 24 and the pot die 26.
  • the lower pot die 26 receives the container 12.
  • the container 12 is suspended in the pot die 26 by a plurality of legs 28 to hold the container 12 in place.
  • the ram 24 applies pressure to the pressure transmitting medium 16. Since the medium 16 and container 12 are restrained in the die 26, pressure is uniformly transferred to the container 12.
  • the pressure transmission takes place omni-directionally, i.e. pressure is transferred equally to the container 12 at all points in a direction perpendicular to the surface of the container 12 at each point.
  • the instant invention therefore provides a method for compacting powder metals, nonmetals, and combinations thereof to form a densified compact 14 ⁇ of a predetermined density.
  • a quantity of such powder material 14 which is less dense than the predetermined density is disposed in a sealed container 12.
  • the container 12 is then disposed in a pressure transmitting medium 16.
  • a predetermined densification of the material is caused by applying hydrostatic pressure to the medium 16 to cause omni-directional pressure transmission to the container 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)
  • Press Drives And Press Lines (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Claims (6)

  1. Verfahren zum Kompaktieren eines Pulvermaterials (14) zur Bildung eines verdichteten Preßlings (14') von vorbestimmter Dichte, wobei das Verfahren das Bereitstellen eines abgedichteten Behälters (12), der das Pulvermaterial (14) enthält, in direktem Kontakt mit einem druckübertragenden Medium (16), das den Behälter (12) einschließt und wobei der Behälter (12) Kontakt zwischen dem Medium (16) und dem Pulvermaterial (14) verhindert, und das Anlegen von Druck auf das Medium (16) umfaßt, wobei von allen Seiten hydraulischer Druck auf und durch den Behälter (12) übertragen wird, was eine vorbestimmte Verdichtung des Pulvermaterials (14) bewirkt, dadurch gekennzeichnet, daß der Behälter (12) eine dauerhaft verformbare, undurchlässige zellige Struktur aufweist, die in Reaktion auf den auf das Medium ausgeübten Druck zusammenfällt und nach dem Aussetzen des hydrostatischen Drucks des Mediums (16) im wesentlichen zusammengefallen bleibt.
  2. Verfahren nach Anspruch 1, worin der Behälter zelligen Schaum enthält.
  3. Verfahren nach Anspruch 1 oder 2, worin der Behälter ein mehrteiliger Behälter (12) ist, der haftend zusammengehalten wird, um eine undurchlässige Abdichtung zu definieren.
  4. Verfahren nach einem der vorhergehenden Ansprüche, worin das druckübertragende Medium ein fluides oder fluidisierbares Medium umfaßt.
  5. Verfahren nach einem der vorhergehenden Ansprüche, worin der Behälter in eine Gefäßform (26) gegeben wird, die das druckübertragende Medium (16) enthält, und ein Kolben (24) in die Gefäßform (26) eingeführt wird, um das Medium (16) zusammenzupressen, um eine vorbestimmte hydraulische Kraft von allen Seiten auf den Behälter (12) und das Pulvermaterial (14) anzulegen, während diese in der Gefäßform (26) gehalten werden, wobei das Pulvermaterial verdichtet wird.
  6. Anordnung zum Kompaktieren eines Pulvermaterials zur Bildung eines verdichteten Preßlings (14') von vorbestimmter Dichte, wobei die Anordnung umfaßt: einen Behälter (12) für das Pulvermaterial (14), ein Reservoir (26) für ein druckübertragendes Medium (16), das zur Aufnahme des Behälters (12) vorgesehen ist, so daß dieser vom Medium eingeschlossen ist, wodurch bei Anlegen von äußerem Druck auf das Medium (16) von allen Seiten Druck auf und durch den Behälter übertragen wird, so daß darin enthaltenes Pulvermaterial zur Bildung des verdichteten Preßlings verdichtet wird, und eine Druckanlegevorrichtung (24) zum Anlegen von Druck auf das Medium, dadurch gekennzeichnet, daß der Behälter (12) eine dauerhaft verformbare, undurchlässige zellige Struktur aufweist, die in Reaktion auf den auf das Medium (16) ausgeübten Druck zusammenfallen kann und dauerhaft verformbar ist und nach dem Aussetzen des Drucks im wesentlichen zusammengefallen bleibt, wobei ein solcher Behälter Kontakt zwischen dem Medium (16) und dem Pulvermaterial (14) während eines derartigen Zusammenfallens verhindert.
EP87311464A 1987-02-09 1987-12-24 Behälter aus Plastikschaum für die Verdichtung von Pulvermaterial Expired - Lifetime EP0278180B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12789 1987-02-09
US07/012,789 US4724123A (en) 1987-02-09 1987-02-09 Plastic foam container for the densification of powder material

Publications (2)

Publication Number Publication Date
EP0278180A1 EP0278180A1 (de) 1988-08-17
EP0278180B1 true EP0278180B1 (de) 1992-05-20

Family

ID=21756706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87311464A Expired - Lifetime EP0278180B1 (de) 1987-02-09 1987-12-24 Behälter aus Plastikschaum für die Verdichtung von Pulvermaterial

Country Status (6)

Country Link
US (1) US4724123A (de)
EP (1) EP0278180B1 (de)
JP (1) JPS63213602A (de)
KR (1) KR880009690A (de)
CA (1) CA1299335C (de)
DE (1) DE3779294D1 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894190A (en) * 1988-09-26 1990-01-16 United Technologies Corporation Staged pultrusion molding of composites
US5294382A (en) * 1988-12-20 1994-03-15 Superior Graphite Co. Method for control of resistivity in electroconsolidation of a preformed particulate workpiece
US5051218A (en) * 1989-02-10 1991-09-24 The Regents Of The University Of California Method for localized heating and isostatically pressing of glass encapsulated materials
CA2031758C (en) * 1989-12-15 1995-10-17 Roy D. Gravener Pressurized powder support for treating processes
US5160678A (en) * 1989-12-15 1992-11-03 United States Surgical Corporation Pressurized powder support for treating processes
US5160677A (en) * 1989-12-15 1992-11-03 United States Surgical Corporation Pressurized powder support for treating processes
DE59104523D1 (de) * 1990-03-14 1995-03-23 Asea Brown Boveri Sinterverfahren mit einer Form aus einem nachgebenden keramischen Körper.
US5770136A (en) * 1995-08-07 1998-06-23 Huang; Xiaodi Method for consolidating powdered materials to near net shape and full density
US6168072B1 (en) 1998-10-21 2001-01-02 The Boeing Company Expansion agent assisted diffusion bonding
US6042780A (en) * 1998-12-15 2000-03-28 Huang; Xiaodi Method for manufacturing high performance components
TWI291458B (en) * 2001-10-12 2007-12-21 Phild Co Ltd Method and device for producing titanium-containing high performance water
ATE517708T1 (de) * 2001-12-05 2011-08-15 Baker Hughes Inc Konsolidiertes hartmaterial und anwendungen
US8343402B1 (en) * 2007-09-13 2013-01-01 The Boeing Company Consolidation of composite material
US8865050B2 (en) * 2010-03-16 2014-10-21 The Boeing Company Method for curing a composite part layup
US8017059B2 (en) 2007-09-13 2011-09-13 The Boeing Company Composite fabrication apparatus and method
US8372327B2 (en) 2007-09-13 2013-02-12 The Boeing Company Method for resin transfer molding composite parts

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US32117A (en) * 1861-04-23 Improvement in seed-planters
GB1186530A (en) * 1967-10-04 1970-04-02 Engelhard Ind Ltd Improvements in or relating to Compacting
GB1290660A (de) * 1970-07-22 1972-09-27
US3741755A (en) * 1971-11-04 1973-06-26 D Allen Method of isostatically pressing metal powder into desired metal shapes
DE3040771A1 (de) * 1980-10-29 1982-05-27 Elektroschmelzwerk Kempten GmbH, 8000 München Verfahren zur herstellung von praktisch porenfreien, polykristallinen formkoerpern duch isostatisches heisspressen in glashuellen

Also Published As

Publication number Publication date
DE3779294D1 (de) 1992-06-25
KR880009690A (ko) 1988-10-04
JPS63213602A (ja) 1988-09-06
US4724123A (en) 1988-02-09
CA1299335C (en) 1992-04-28
EP0278180A1 (de) 1988-08-17

Similar Documents

Publication Publication Date Title
EP0278180B1 (de) Behälter aus Plastikschaum für die Verdichtung von Pulvermaterial
US4596694A (en) Method for hot consolidating materials
EP0092992B1 (de) Druckübertragungsmedium und Verfahren zu dessen Anwendung für die Verdichtung von Materialien
US4547337A (en) Pressure-transmitting medium and method for utilizing same to densify material
EP0218270B1 (de) Selbstverschliessende Schmelzform
JPS59104300A (ja) モ−ルデイング工具組立体
US4085790A (en) Casting method using cavityless mold
CN210359247U (zh) 一种冷等静压管坯成型模具
US3107158A (en) Method for the manufacture of pipes of concrete having prestressed longitudinal and annular reinforcements
US3824051A (en) Mold apparatus for isostatic pressing of hollow parts
US4252760A (en) Method and apparatus for manufacturing articles by pressing and sintering
US4828639A (en) Elastomeric ball pressurizing method for adhesive bonding of assemblies
JPS59209109A (ja) 硬化性成型材料製成型体の製造方法
US4349326A (en) Apparatus for manufacturing articles by pressing and sintering
KR920003838Y1 (ko) 분말 물질을 압밀하기 위한 장치
JPS6239201B2 (de)
JP3869072B2 (ja) 圧粉体の成形方法
JPS61266204A (ja) 静水圧加圧成形用型並びにそれを用いた粉末成形方法
JP2836139B2 (ja) 泥しょう鋳込成形装置
JPS58197202A (ja) 注型圧力伝達器による材料の固化方法
US4470803A (en) Method and apparatus for manufacturing articles by pressing and sintering
JPH10298609A (ja) 金属系多孔質焼結体の製造方法
WO1990001385A1 (en) Process for making a consolidated body
JPH08302403A (ja) 加圧成形方法
JPS62130797A (ja) ラバ−プレスによる圧粉体の成形方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19890214

17Q First examination report despatched

Effective date: 19900912

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 3779294

Country of ref document: DE

Date of ref document: 19920625

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920831

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920902

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920916

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19921231

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931225

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19931231

Ref country code: CH

Effective date: 19931231

Ref country code: BE

Effective date: 19931231

BERE Be: lapsed

Owner name: THE DOW CHEMICAL CY

Effective date: 19931231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940701

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940812

Year of fee payment: 8

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940822

Year of fee payment: 8

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940930

Year of fee payment: 8

EUG Se: european patent has lapsed

Ref document number: 87311464.9

Effective date: 19940710

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951224

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960830

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960903

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051224